<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>登录验证-非常重要</title>
		<script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js">
			</script>
			<script>
				function checkUname(){
					//用户输入的
					$("#uname").val();
					//验证规则(正则表达式)
					reg=/^[a-zA-Z0-9]{3,10}$/;//{3,10}:最少三个，最多十个
					if(!reg.test(uname)){//用户名和规则是否匹配
						$("#uname").css("border-color","red");
						return false;
					}else{
						$("#uname").css("border-color","");
						return true;
					}
				}
				function checkUpsw(){
					psw=$("#upsw").val();
					reg=/^[0-9]{6}$/;
					if(!reg.test(psw)){
						$("#upsw").css("border-color","red");
						return false;
					}else{
						$("#upsw").css("border-color","");
						return true;
					}
				}
				function checkAll(){
					checkUname()&&checkUpsw();
				}
			</script>
	</head>
	<body>
	<h3>用户名是字母数字组合,3——10个;密码六个数字</h3>
	    用户名<input onblur="checkUname()" type="text" id="uname" />
	    密码<input onblur="checkUpsw()" type="password" id="upsw" />
	    <button onclick="checkAll()">登录</button>
	</body>
</html>
